Combination check-valve and water seal.



J. G. ENGBLHART. COMBINATION GHEGK VALVE AND WATER SEAL.

APPLICATION IILE'D 0013.22, 1908.,

- Patented Sept. 14, 1909 .tion, is removed.

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Jo'nn e. nnonrnsar, or arteries, oneness COMBINATION CHECK-VALVE .KND W'ATEEQEAL.

Specification of Letters Patent. Patented Sept, as, fifi'fitfii,

Application filed ()ctober 22, 1908. Serial N0. $59,021.

To all whom itmay concern:

Be it knownv that I, JOHN G. ENGELHART, a citizen of the United States, residing at Atlanta, in the county of Fulton. and State or" tireorgia, have invented certain new and useful Improvements in Combination Check- Valves and \Vater Seals, of which the following -is a specification.

This invention relates to improvements in combination water seals and check valves and has for an object'the provision of improved means that will permit the escape of air and the condensed water, but not the escape of the heating, steam or vapor.

Another objectof the invention is the pro vision of an improved ball check valve used in connection with an elbow which forms a water seal when used in connection with a radiator so that a check valve and-water seal is presented in a single device.

.These and other objects in view, the invention comprises certain novel constructions, combinations and arrangement of parts that will be hereinafter more fully described and claimed.

'In the accompanying drawing: Figure 1 is a vertical longitudinal section through part of the radiator and my improved device. Fig. 2 is a section through Fig.1 on line 2, 2.

In steam'heating the steam or vapor is forced into the radiator and after condensaln forcing steam in the radiator, it is necessary at the same time to force out the air contained therein' Various means have been provided for assisting in removing the air contained in the radiator and also in removing the condensation of steam with varying success. It is to this class of'devices that the present invention relates.

Referring more particularly to the drawing, 1 indicates a radiator of an desired construction into which is tappe' a short length of pipe constitutinga conduit. Secured to the conduit 2 is an elbow 3, which projects into radiator 1, as clearly seen in Fig. 1., and together with the radiator forms a trap or water seal. The elbow 3 is formed with an aperture constituting a vent through which air. and some of the steam and vapor in the radiator passes outward thr'ou h conduit 2 to the return pipe 5. The

conduit 2 is formed with a seat 6, into which is fitted a ball 7 that closes the passage way between the return pipe 5 and the radiator 1.

will be observed, tha

The ball 7 is mounted upon a pair of runways 8, which is adapted to kee' the ball centered with its seat 6, and to aiso form. a smooth path, so that the ball will move easily. A h1g9 is also provided in the elhow 10, for limiting the movement of ball 7 and for preventing it from passing into the turn pipe 5. The elbow 10 is held in dense and forms water in the bottom of the radiaton-it will rise until the same is above the level of the straight portion 12 of the elbow 3. After the water has reached this height, that formed by condensation thereafter will run into the return pipe 5. The water remaining in. the radiator will cover the lower end of elbow if? and prevent the escape of steam and vaphr through the return pipe. "While the condensation is going on the air and some of the vaporand steam escapes through thehole or aperture 4, so as to cause substantially an even pressure on each side of the water seal and thus, prevent the water seal from being forced out into the return pipe. When the supply valve for admitting steam or vapor is shut oi, the steam in the radiator condenses. This lowers the pressure in the radiator until it is lower than the pressure in the return pipe 5. This will cause the ball 7 to move over and seat itself and. prevent any steam, vapor or water of condensation from hacking into the radiator from the return pi e and incidentally, it

no air will be permit.- ted to back into the radiator, so that when the radiator finally cools oihthe sanie will have formed therein a vacuum or partial. vacuum, so that on the admission of steam into the radiator the same will not be com pelled to drive out any air.

' What I claim is: v

The combination with a radiator having a chamber at its lower portion for trapping the water of condensation, of a conduit provided at one end with a valve seat, a curved elbow secured to said conduit and extending iii) upperside with a vent, a second elbow se cured to the conduit "at the end opposite to said first mentioned elbow and communicating with the return pipe and provided With a lug, and a ball valve arranged 'Within said down into the chamber and provided inits' air or Water to' the radiator.

In testimonywhereof I affix my signature. in presence of two Witnesses. I

JOHN G. ENGELHART.

second mentioned elbow and engagin the i Witnesses: seat in said conduit, said ball valve eing DE LANA LUN UnsT, limited in its movement in one-direction by v J. H. DEERING.

the lug and operating to prevent return of 140 

